#include "gtest/gtest.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/DataTypes.h"
#include <cstdlib>
#include <ctime>
using namespace llvm;
using namespace support;
#undef max
namespace {
TEST(Endian, Read) {
unsigned char big[] = {0x00, 0x01, 0x02, 0x03, 0x04};
unsigned char little[] = {0x00, 0x04, 0x03, 0x02, 0x01};
int32_t BigAsHost = 0x00010203;
EXPECT_EQ(BigAsHost, (endian::read_be<int32_t, unaligned>(big)));
int32_t LittleAsHost = 0x02030400;
EXPECT_EQ(LittleAsHost, (endian::read_le<int32_t, unaligned>(little)));
EXPECT_EQ((endian::read_be<int32_t, unaligned>(big + 1)),
(endian::read_le<int32_t, unaligned>(little + 1)));
}
TEST(Endian, Write) {
unsigned char data[5];
endian::write_be<int32_t, unaligned>(data, -1362446643);
EXPECT_EQ(data[0], 0xAE);
EXPECT_EQ(data[1], 0xCA);
EXPECT_EQ(data[2], 0xB6);
EXPECT_EQ(data[3], 0xCD);
endian::write_be<int32_t, unaligned>(data + 1, -1362446643);
EXPECT_EQ(data[1], 0xAE);
EXPECT_EQ(data[2], 0xCA);
EXPECT_EQ(data[3], 0xB6);
EXPECT_EQ(data[4], 0xCD);
endian::write_le<int32_t, unaligned>(data, -1362446643);
EXPECT_EQ(data[0], 0xCD);
EXPECT_EQ(data[1], 0xB6);
EXPECT_EQ(data[2], 0xCA);
EXPECT_EQ(data[3], 0xAE);
endian::write_le<int32_t, unaligned>(data + 1, -1362446643);
EXPECT_EQ(data[1], 0xCD);
EXPECT_EQ(data[2], 0xB6);
EXPECT_EQ(data[3], 0xCA);
EXPECT_EQ(data[4], 0xAE);
}
TEST(Endian, PackedEndianSpecificIntegral) {
unsigned char big[] = {0x00, 0x01, 0x02, 0x03, 0x04};
unsigned char little[] = {0x00, 0x04, 0x03, 0x02, 0x01};
big32_t *big_val =
reinterpret_cast<big32_t *>(big + 1);
little32_t *little_val =
reinterpret_cast<little32_t *>(little + 1);
EXPECT_EQ(*big_val, *little_val);
}
}